I cannot doubt that at the edge of the earth's envelope the risk would be a very real one.

"Very well; although I will begin to doubt your memory at this rate."

"A lot of people always tend to doubt me, especially at playoff time," Johnson said.

There might be a bus, but I somehow doubt it at that time of the night.

"You doubt the power of Nature at your peril, woman."

We have no reason to doubt her credibility at this point.

I see no reason to doubt the results at this time.

And he'd been right in that, though she'd doubted him at the time.

The one who thought he was the son of God only doubted at the last moment.

"It was based on information that I had no reason to doubt at the time," he said.